Guangtongxin yanjiu (Jun 2024)
Nonlinear Mutation Frequency Interference Detection Algorithm for All Optical Communication Networks
Abstract
【Objective】When analyzing the nonlinear mutation frequency interference problem in all optical communication networks, interference detection mainly relies on estimating channel covariance directly, without expanding network communication signal transformation processing, resulting in low F1-score values of the detection results. Therefore, a nonlinear abrupt frequency interference detection algorithm based on finite difference time domain is proposed for all-optical communication networks.【Methods】We collect all optical communication network traffic data by combining packet capturing and mirroring methods, followed by cleaning, conversion, and protocol processing. Relying on the working principle of finite difference time-domain method, we first describe the time width and bandwidth of the signal in time-domain and frequency-domain space. Then we apply derivative and Fourier transform algorithm to transform the real-time collected network communication signal. Next, we use the transformed signal to analyze the nonlinear abrupt frequency interference. Finally the transformed signal is detected and analyzed. With the aid of the time-frequency joint feature analysis method, the time-domain and frequency-domain features of the interference signal are extracted. Relying on the back propagation algorithm and the minimization of the loss function, the detection process of nonlinear abrupt frequency interference is simplified. The characteristic distance function is used to replace the network loss function, and it is input into the interference recognition model based on the twin network to obtain the detection results of nonlinear abrupt frequency interference.【Results】The experimental results show that under different noise conditions, the F1-score value of the proposed algorithm's nonlinear mutation frequency interference detection results remains above 0.95. The detection time is less than 40 ms.【Conclusion】The new detection method using the finite difference time-domain method can more accurately reflect the interference situation of the current communication network. It ensures the normal operation of the communication network, and meets the interference detection requirements of all-optical communication network.
